Diffusion Type Fan Device

ABSTRACT

A fan device includes a primary blade unit, a guiding member, and a secondary blade unit. The primary blade unit includes a mounting seat having a plurality of flow channels, and a primary blade rotatably mounted in the mounting seat and having a plurality of ventilating holes that are movable to align with the flow channels. The guiding member has a plurality of flow guiding ducts aligning with the flow channels. The guiding member has a flow guiding surface. The secondary blade unit includes a plurality of mounting plates having a vent hole for mounting a plurality of secondary blades. Thus, when the ambient air flow is introduced into the fan device, the primary blade unit and the secondary blade unit guide and inject the air flow in two different directions to diffuse and spread the air flow.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a fan and, more particularly, to a fan device that functions as a ceiling fan or an electric fan.

2. Description of the Related Art

A conventional fan device 1 in accordance with the prior art shown in FIG. 1 comprises a plurality of blades 12 and a driving device 11 connected with the blades 12 to drive and rotate the blades 12. Thus, the blades 12 are rotated by the driving device 11 to introduce an air flow so as to provide an air ventilating effect to a room, thereby providing a comfortable sensation to the user. However, when the blades 12 are rotated, the air flow introduced by rotation of the blades 12 is directed toward a determined direction, such as in the horizontal direction, and cannot blow in different directions, thereby greatly limiting the air ventilating effect.

BRIEF SUMMARY OF THE INVENTION

In accordance with the present invention, there is provided a fan device, comprising a primary blade unit, and a guiding member connected with the primary blade unit. The primary blade unit includes a mounting seat having a first side provided with a plurality of flow channels, a primary blade rotatably mounted in the mounting seat and having a periphery provided with a plurality of ventilating holes that are movable to align with the flow channels of the mounting seat respectively, and a driving mechanism mounted on the mounting seat to drive and rotate the primary blade. The driving mechanism of the primary blade unit is located between the mounting seat and the guiding member. The guiding member is located outside of the mounting seat of the primary blade unit and has a periphery provided with a plurality of flow guiding ducts aligning with the flow channels of the mounting seat respectively. The guiding member has an outer side provided with a flow guiding surface.

The fan device further comprises a secondary blade unit connected with the primary blade unit. The secondary blade unit includes a plurality of mounting plates connected with the mounting seat of the primary blade unit, and an end cap connected with the mounting plates. Each of the mounting plates of the secondary blade unit has a surface provided with a vent hole for mounting a plurality of secondary blades. Each of the secondary blades is pivotally mounted in the vent hole. The secondary blade unit further includes a plurality of adjusting members each movably mounted on a respective one of the mounting plates and each pivotally connected with the secondary blades on the respective mounting plate to drive and pivot the secondary blades relative to the respective mounting plate.

The primary objective of the present invention is to provide a diffusion type fan device that can guide an air flow in different directions so as to diffuse and expand the traveling path and angle of the air flow.

According to the primary advantage of the present invention, when the ambient air flow is introduced into the fan device, the primary blade unit and the secondary blade unit guide and inject the air flow outward in two different directions simultaneously to diffuse and spread the air flow largely and to increase the air circulation, thereby greatly enhancing the air ventilating and circulating effect.

According to another advantage of the present invention, the fan device has a better air ventilating and circulating effect so as to reduce the number of fans that are necessary in a determined space, thereby decreasing the cost.

According to a further advantage of the present invention, the air flow is guided through the flow guiding ducts of the guiding member, the flow channels of the mounting seat and the ventilating holes of the primary blade into the mounting seat of the primary blade unit so that the air flow is circulated smoothly and quickly.

According to a further advantage of the present invention, the secondary blades are pivoted in the vent hole to change the inclined angle of each of the secondary blades so as to adjust the air output from the vent hole of each of the mounting plates.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

FIG. 1 is a perspective view of a conventional fan device in accordance with the prior art.

FIG. 2 is a perspective view of a fan device in accordance with the preferred embodiment of the present invention.

FIG. 3 is a perspective cross-sectional view of the fan device as shown in FIG. 2.

FIG. 4 is an exploded perspective view of the fan device as shown in FIG. 2.

FIG. 5 is a front cross-sectional view of the fan device as shown in FIG. 2.

FIG. 6 is a schematic operational view of the fan device as shown in FIG. 5.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 2-5, a fan device in accordance with the preferred embodiment of the present invention comprises a primary blade unit 3, a guiding member 2 connected with the primary blade unit 3, and a secondary blade unit 4 connected with the primary blade unit 3.

The primary blade unit 3 includes a mounting seat 31 having a first side 37 provided with a plurality of flow channels 32, a primary blade 35 rotatably mounted in the mounting seat 31 and having a periphery provided with a plurality of ventilating holes 36 that are movable to align with the flow channels 32 of the mounting seat 31 respectively, and a driving mechanism 34 mounted on the mounting seat 31 to drive and rotate the primary blade 35.

The mounting seat 31 of the primary blade unit 3 is hollow and has a tapered shape. The mounting seat 31 of the primary blade unit 3 is sandwiched between the primary blade 35 and the guiding member 2. The first side 37 of the mounting seat 31 has a surface provided with a through hole 311. The mounting seat 31 of the primary blade unit 3 has an open second side provided with a plurality of connecting holes 314. The mounting seat 31 of the primary blade unit 3 has a diameter increased gradually from the first side 37 to the open second side of the mounting seat 31. The flow channels 32 of the mounting seat 31 are arranged in an annular shape.

The driving mechanism 34 of the primary blade unit 3 is located between the mounting seat 31 and the guiding member 2. The driving mechanism 34 of the primary blade unit 3 includes a propeller shaft 341 extended through the through hole 311 of the mounting seat 31 and extended into the mounting seat 31 and a drive motor (not shown) for driving and rotating the propeller shaft 341.

The primary blade unit 3 further includes a spindle 33 rotatably mounted on a central portion of the first side 37 of the mounting seat 31 and connected with the primary blade 35 to rotate the primary blade 35, a drive gear 312 secured on the propeller shaft 341 of the driving mechanism 34 to rotate in concert with the propeller shaft 341 of the driving mechanism 34, and a driven gear 313 secured on the spindle 33 to rotate the spindle 33 and meshing with and driven by the drive gear 312. The driven gear 313 of the primary blade unit 3 is located between the primary blade 35 and the first side 37 of the mounting seat 31. The primary blade 35 of the primary blade unit 3 has a central portion secured on the spindle 33 to rotate in concert with the spindle 33. The ventilating holes 36 of the primary blade 35 are arranged in an annular shape.

The guiding member 2 is located outside of the mounting seat 31 of the primary blade unit 3 and has a periphery provided with a plurality of flow guiding ducts 22 aligning with the flow channels 32 of the mounting seat 31 respectively. The flow guiding ducts 22 of the guiding member 2 are arranged in an annular shape. The guiding member 2 has an outer side provided with a flow guiding surface 23. The flow guiding surface 23 of the guiding member 2 has a tapered shape and is connected to the flow guiding ducts 22. The guiding member 2 has a central portion provided with a receiving recess 211 for mounting the driving mechanism 34 of the primary blade unit 3.

The secondary blade unit 4 includes a plurality of mounting plates 41 connected with the mounting seat 31 of the primary blade unit 3, and an end cap 45 connected with the mounting plates 41. The end cap 45 of the secondary blade unit 4 has a surface provided with a plurality of air inlets 450 connected to an interior of the mounting plates 41.

The mounting plates 41 of the secondary blade unit 4 are located between the mounting seat 31 of the primary blade unit 3 and the end cap 45 of the secondary blade unit 4, and the mounting seat 31 of the primary blade unit 3 is received in the mounting plates 41 of the secondary blade unit 4. Each of the mounting plates 41 of the secondary blade unit 4 has a substantially arc-shaped profile and has a first end connected with the mounting seat 31 of the primary blade unit 3 and a second end connected with the end cap 45. The mounting plates 41 of the secondary blade unit 4 are connected with each other to form a substantially cylindrical barrel. Each of the mounting plates 41 of the secondary blade unit 4 has a side provided with at least one connecting rod 411 connected with a respective one of the connecting holes 314 of the mounting seat 31 to connect the mounting plates 41 of the secondary blade unit 4 with of the primary blade unit 3.

Each of the mounting plates 41 of the secondary blade unit 4 has a surface provided with a vent hole 42 for mounting a plurality of secondary blades 43. The vent hole 42 of each of the mounting plates 41 is connected to the flow guiding surface 23 and the flow guiding ducts 22 of the guiding member 2. Each of the secondary blades 43 is pivotally mounted in the vent hole 42. The secondary blade unit 4 further includes a plurality of adjusting members 44 each movably mounted on a respective one of the mounting plates 41 and each pivotally connected with the secondary blades 43 on the respective mounting plate 41 to drive and pivot the secondary blades 43 relative to the respective mounting plate 41.

In operation, referring to FIG. 5 with reference to FIGS. 2-4, the propeller shaft 341 of the driving mechanism 34 is rotated by the drive motor to rotate the drive gear 312 which rotates the driven gear 313 which rotates the spindle 33 which rotates the primary blade 35 so that the primary blade 35 is rotated successively to produce a suction force to draft or draw an air flow. Thus, the ambient air flow is introduced through the air inlets 450 of the end cap 45, the mounting plates 41 of the secondary blade unit 4, the flow guiding ducts 22 of the guiding member 2, the flow channels 32 of the mounting seat 31 and the ventilating holes 36 of the primary blade 35 into the mounting seat 31 of the primary blade unit 3 and is injected outward from the mounting seat 31 of the primary blade unit 3 to provide a ventilating function. At this time, the air flow is partially guided by the flow guiding surface 23 of the guiding member 2 to flow through the vent hole 42 of each of the mounting plates 41 and is injected outward from the vent hole 42 of each of the mounting plates 41 to further provide a ventilating function. Thus, when the air flow is introduced from the ambient environment into the fan device, the primary blade unit 3 and the secondary blade unit 4 can guide and inject the air flow outward in two different directions as shown in FIG. 5 to diffuse and spread the air flow and to increase the air circulation, thereby greatly enhancing the air ventilating and circulating effect.

As shown in FIG. 6, the secondary blades 43 are driven by the adjusting members 44 and are pivoted in the vent hole 42 to change the inclined angle of each of the secondary blades 43 relative to the vent hole 42 of each of the mounting plates 41 so as to adjust the air output from the vent hole 42 of each of the mounting plates 41.

Accordingly, when the ambient air flow is introduced into the fan device, the primary blade unit 3 and the secondary blade unit 4 guide and inject the air flow outward in two different directions simultaneously to diffuse and spread the air flow largely and to increase the air circulation, thereby greatly enhancing the air ventilating and circulating effect. In addition, the fan device has a better air ventilating and circulating effect so as to reduce the number of fans that are necessary in a determined space, thereby decreasing the cost. Further, the air flow is guided through the flow guiding ducts 22 of the guiding member 2, the flow channels 32 of the mounting seat 31 and the ventilating holes 36 of the primary blade 35 into the mounting seat 31 of the primary blade unit 3 so that the air flow is circulated smoothly and quickly. Further, the secondary blades 43 are pivoted in the vent hole 42 to change the inclined angle of each of the secondary blades 43 so as to adjust the air output from the vent hole 42 of each of the mounting plates 41.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention. 

1. A fan device, comprising: a primary blade unit; and a guiding member connected with the primary blade unit; wherein the primary blade unit includes: a mounting seat having a first side provided with a plurality of flow channels; a primary blade rotatably mounted in the mounting seat and having a periphery provided with a plurality of ventilating holes that are movable to align with the flow channels of the mounting seat respectively; and a driving mechanism mounted on the mounting seat to drive and rotate the primary blade; the driving mechanism of the primary blade unit is located between the mounting seat and the guiding member; the guiding member is located outside of the mounting seat of the primary blade unit and has a periphery provided with a plurality of flow guiding ducts aligning with the flow channels of the mounting seat respectively; the guiding member has an outer side provided with a flow guiding surface.
 2. The fan device of claim 1, wherein the fan device further comprises a secondary blade unit connected with the primary blade unit; the secondary blade unit includes: a plurality of mounting plates connected with the mounting seat of the primary blade unit; and an end cap connected with the mounting plates; each of the mounting plates of the secondary blade unit has a surface provided with a vent hole for mounting a plurality of secondary blades; each of the secondary blades is pivotally mounted in the vent hole; and the secondary blade unit further includes a plurality of adjusting members each movably mounted on a respective one of the mounting plates and each pivotally connected with the secondary blades on the respective mounting plate to drive and pivot the secondary blades relative to the respective mounting plate.
 3. The fan device of claim 2, wherein the mounting seat of the primary blade unit has an open second side provided with a plurality of connecting holes; the mounting seat of the primary blade unit is hollow and has a tapered shape; the mounting seat of the primary blade unit has a diameter increased gradually from the first side to the open second side of the mounting seat; each of the mounting plates of the secondary blade unit has a first end connected with the mounting seat of the primary blade unit and a second end connected with the end cap; and each of the mounting plates of the secondary blade unit has a side provided with at least one connecting rod connected with a respective one of the connecting holes of the mounting seat to connect the mounting plates of the secondary blade unit with of the primary blade unit.
 4. The fan device of claim 2, wherein the first side of the mounting seat has a surface provided with a through hole; the driving mechanism of the primary blade unit includes a propeller shaft extended through the through hole of the mounting seat and extended into the mounting seat; the primary blade unit further includes: a spindle rotatably mounted on a central portion of the first side of the mounting seat and connected with the primary blade to rotate the primary blade; a drive gear secured on the propeller shaft of the driving mechanism to rotate in concert with the propeller shaft of the driving mechanism; and a driven gear secured on the spindle to rotate the spindle and meshing with and driven by the drive gear.
 5. The fan device of claim 4, wherein the mounting plates of the secondary blade unit are located between the mounting seat of the primary blade unit and the end cap of the secondary blade unit; the mounting seat of the primary blade unit is received in the mounting plates of the secondary blade unit; the driven gear of the primary blade unit is located between the primary blade and the first side of the mounting seat; and the primary blade of the primary blade unit has a central portion secured on the spindle to rotate in concert with the spindle.
 6. The fan device of claim 1, wherein the mounting seat of the primary blade unit is sandwiched between the primary blade and the guiding member; the guiding member has a central portion provided with a receiving recess for mounting the driving mechanism of the primary blade unit; and the vent hole of each of the mounting plates is connected to the flow guiding surface and the flow guiding ducts of the guiding member. 